The Cloud of Unknowing. 

 - 1a ed. 
 - New York :  Paulist Press,  1981. 
 - 293 p. ;  23 cm. 
<br/><br/><label>ISBN: </label>0809123320 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Altri autori (Catalogo Generale) - Letteratura primaria